condition mean min max ZT0-3 26.5426 26.5426 26.5426 ZT4-7 21.999000000000002 21.999000000000002 21.999000000000002 ZT8-11 22.4353 22.4353 22.4353 ZT12-15 22.5974 22.5974 22.5974 ZT16-19 27.3999 27.3999 27.3999 ZT20-23 25.7598 25.7598 25.7598